My DS aged 34 months has been great and potty trained since August. He's had the odd accident which I'm not worried about. But last night (twice) and this morning at my mum's (she looks after him 2 days a week) he has seemingly deliberately wet himself. We used the "Oh Crap! It's Potty Training Book" and he got it really quickly. But with the deliberate pees he is laughing afterwards like its funny! I have told him off and my mum has just told him off and has not taken him to Tumbletots - a) because he was naughty) and b) because he now has no spare pants or trousers! Advice appreciated please mummies!